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Electronics Engineering
Electronics Engineering is a branch of engineering that deals with practical applications of electronic components, devices, systems, or equipment. Electronics are devices that operate on low voltage sources, as in electron tubes, transistors, integrated circuits, and printed circuit boards and use electricity as part of its driving force.
24,372 Questions
How do you calculate downlink frequency by uplink?
You would need to know the LO frequency from the satellite.
Ex- C-band is 2200Mhz
If you UL is 6.0GHz you DL would be 3.8GHz
What are reciprocal circuit elements?
Reciprocal circuit elements are those elements/circuits in which power loss/gain is same at both nodes/ends.In these types of circuits we can check the circuit or connect it in any way.
What do you mesure the answer of Ohm's law in?
Ohm's law can be used to find the current, voltage or resistance in a electrical circuit.
The formula is V=IR
where 'V' is the Voltage measured in Volts (V),
'I' is the current measured in Amperes (A)
And 'R' is the resistance, measured in Ohms (Ω)
How are radio waves used to find the speed of a moving object?
By using an phenomenon called the Doppler Effect, which causes waves (e.g. radio, light, sound) that are reflected off a moving object (or emitted by a source on a moving object) to shift frequency proportionally to the speed of the object.
- if the object is moving towards the observer the waves shift to a higher frequency
- if the object is moving away from the observer the waves shift to a lower frequency
For objects that emit the waves themselves (e.g. stars, galaxies) it is necessary to find spectral lines of known elements or compounds and measure how much the frequency of these spectral lines have shifted from their known standard frequency. If sound waves emitted by a vehicle (e.g. train whistle) you must somehow know the frequency of the sound source on the vehicle when it isn't moving (this may or may not be possible).
This sounds like highschool physics homework. The answer is simple ohms law and algebra. The short answer is Voltage = Current x Resistance. If you know two things you can find the third.
To be honest, this is a simple question and your book or Wikipedia can tell you. Just solve for the unknown.
When you require dc source it is preferable to use a dc power supply instead of a battery why?
It depends on where the power source is needed. In portable equipment for starting engines or portable equipment like cordless saws, drills, or lights a battery is the preferred method of power. In indoor stationary charging equipment for portable phones for example a continuous supply of AC power being converted to DC is more convenient than have batteries around the home that have to be charged when running low on voltage.
Is there another season of monochrome factor?
There is not a second season of monochrome factor at the moment, but I'm hoping that they will make a new one, and soon :D
What is the function of a capacitor in the half wave rectification?
to smooth the output of the half-wave rectifier from 1/2 an AC cycle per period to a constant voltage.
Give the definition of output offset voltage of Op-Amp?
The output voltage of a opamp when the input of inverting and non inverting terminals are grounded
What is the virtual value of ac whose peak value is 707V?
virtual value=peak value/root 2
=707/1.414
=500
A: Practically all of the bridges used to find the value of passive components uses a null signal to determine the value In reality null means the lack of a signal where it is virtually eliminated when that occurs that is the null or no signal.
Both are 1.5A adjustable voltage regulators. The LM317 outputs a positive (with respect to ground) voltage, and the LM337 outputs a negative voltage.
What is TUF for half wave rectifier?
It indicate how well the input transformer is being utilized.
It is given by the ratio of DC output power to the AC power rating of Transformer.
A meter stop is a small metal or plastic peg placed just beyond the limits of normal meter movement on an analog meter movement to prevent the needle from moving too far off scale. Overloading a meter so that it hits the meter stop hard is often called "pegging" the meter and can damage it by bending the needle.
How a bootstrap sweep circuit works?
A bootstrap sweep circuit basically works by linking together circuitry that can operate on its own without assistance from any outside or external source once it is activated. Much like basic alternating current this circuit can keep functioning all alone when properly linked up.
What does the word junction mean?
If you are looking at a wiring schematic, junction refers to a point where two or more wires are connected together to complete a circuit.
How bright is 12000 to 15000 mcd LED?
Have you seen the solar lights used in the garden, they use 12000-15000 mcd LEDs
What is the symbol for inductor?
L is the symbol for inductance. An inductor is a passive two-terminal electrical component which resists changes in electric current passing through it.
If a 12V device is dissipating 50W how much load resistance does the device represent?
P = V x I
I = 50 / 12
I = 4.17
R = 50 / (4.17*4.17)
= ~2.88
